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Even though ventless fireplaces are safe to use overall, you shouldn’t let them run for more than a few hours per day. It’s also important to make sure the room with the fireplace is well-ventilated. If not, the water vapor from the fire could increase the humidity levels in your home, potentially resulting in mold growth.

A hearth often looks like a tile or brick floor that juts out from and surrounds your fireplace. A hearth can be made of stone, brick, ceramic, or any other fireproof material. Brick offers a classic and traditional vibe, whereas a hearth made of marble or ceramic may lean more toward modern aesthetics. The most common depth of a hearth is 20 inches.

Yes, if your gas fireplace has a flue, you typically need to open it when using the fireplace. Although gas fireplaces don’t produce the type of smoke and soot that wood-burning ones do, they still release combustion gasses like carbon monoxide. Opening the flue ensures these gasses safely exit your home through the chimney. Not all gas fireplaces need a chimney, however. Always check the manufacturer’s instructions for your specific gas fireplace model, as some newer models may have different ventilation requirements.

A 40-pound bag of wood pellets can provide a solid 24 hours or so of burn time, though the exact length may vary. If you’re using your pellet stove as an exclusive heat source during the winter, you’ll need an estimated 100 to 150 of those 40-pound bags, depending on how hot you like to keep your home, its size, the climate, and other factors.